A buttock lift is a cosmetic surgical procedure to improve the appearance of the buttocks. It's typically done as part of a belt lipectomy or lower body lift to contour the buttocks, groin, thighs and abdomen.During a buttock lift, excess skin and fat are removed from the buttocks. The remaining skin is then repositioned to create a more toned look.You might choose to have a buttock lift if your buttocks appear saggy due to weight loss, aging or genetics. A buttock lift can boost your body image.